Apparatus for the manufacture of paper



Aug. 3, 1926.

V. D. SIMONS APPARATUS FOR THE MANUFACTURE OF PAPER,

Filed Sept. 16, 1921 D. Simajiq Patented 3, .1926.

umTEo-esrArs vmnmm 1). Simmons,

or cnrcaeo, minors.

- nrnnarus nor. am: mh'fiuracrunn or rerun.

ippfication and September 16, 1921. Serial 110. 501,113.

This invention relates to an improved process and apparatus forthemanufacture of paper and its purpose is to provide means Y forincreasing the speed and. efficiency of paper manufacturing operations.

An important object of the invention is to provide means for causingpulp stock to flow positively in an angular path adjacent-to the mold onwhich the'paper 'web is formed. A further object is to provide anapparatus of the cylindrical type carrying an endless wire belt and"comprising means for moving the pulp stock positively in the samedirection that the wire belt travels. Still another object is to providea simultaneous movement of the paper mold and pulp stock together withmeans for regulating the relative speeds of these movements. furtherobject is to provide a movable paper mold in combination with meansindependent of the pulp and stock supply for eifecting allocalcirculation of the pulp stock through the mold containing vessel-or vat.Other objects relate to various features of constructionand arrangementwhieh will appear more fully hereinafter. T

The natfiire' of the invention will be understeed from the followingspecification taken w th the accompanying drawings in which oneembodiment is illustrated.

..In the drawings- Fi'gure 1 shows a side elevation of the' apparatus; vFig. 2 shows n end elevation of the ,a paratus,. parts of the interiorconstructron illustrated by dotted lines. The invention comprises avessel 10 having side walls 11 and a lower wall 12. A portion of thelower wall 12 is semicylin drical in contour and the sidesthereof ex- 1.tend upwardly withinthe vessel to form weirs 13 and 14 over which theplu adapted to pass during .itsftravel t rou the apparatus. .'At the inlt' end of t e vessel 10, the side walls are b an end wall' 15 havin aninlet pipe 16" cad ing therethrough or supplym thefpulp stock to.the"vessel. Opposite t e wall 15,

another wall 17 extends upwardly into the vessel to form a weir overwhich the. .pulp

flows. and this wall extends downwardly beneath the lowergwall12'parallelto the wall 15 to form an inlet passage 18 thro h which thepulp flows upwardly overt e r weirs 13 and 17, thus compelling the pulpweir 17. A transverse wall' 19 extends downwardly from the top of thevessel between the side walls 11 and terminates above the lower wall 12in the space between the to pass through an irregular path from theregion adjacent the inlet conduit 16. At the dischargeside of themachine the pulp flows over the weir 14 into a discharge channel whichis formed between the side walls 11 by the end wall 21 and the parallelvertical wall 22 which -extends downwardly from the weir i i. Thedischarge channel 23, thus formed, communicates through aoonnectingtpipe 24 and an elbow 25 with the centrifugal ump 26. Thispump is connected .on its fie rge side by pipe 27 and an elbow28 tli hechannel, 18 which communicates. with the inlet side of the tank 1( Thepump 26 7 thus operates to efi'ect a local circulation of the pulpthrough the tank independently of the supply of pulp through the pipe16.

p? In the region above the semicylindri'cal lower wall 12 there'ismounted a cylindrical mold 30 having a cylindrical wallmounted on endbrackets 31 provided with trunnions 32 which are journalled inbearings-carr'ied by the side walls 11.. A woven wire mold33 extendsaround the cylinder 30 which rotates in the direction indicated by thearrow 34. This mold 33 passes over a roll 35 and turns over a series' oftable rolls 36. After passing over the table rolls,.

the wire mold passes over a-series of suction boxes 37 and then betweentwi couch rolls 38. After passing around the lower couch" roll the wirebelt 33 is carried back to the I cylindrical mold 30, being supported bya series of rolls 39. I f'The pulp stock fo use in the vessel 10 v 'ispreferably formed by mixing about 5% of fibrous material with 95% water,thus form- 'ing a fluid pulp stock adapted to flow freely. This pulpstock which is introducedint0 the tank 10 through the pipe 16 flowsthrough the irregular passage. formed by the weirs 13 and 17' and thebaflle wall 19 into the s ace adjacent to the mold 30. The

I level of the pulp stock'bn the inlet sideof I themold member is abovethat on the disp charge. side and the liquid of the pulp stock flowsthrough the perforated belt 33 into the interior of the cylindrical moldfrom.

which-it is drawn ofi by pipe 40. The water regulation of the return offlow of the water from the interior of the cylindrical member; Byregulating this valve the head of the water can be maintained within thec lindrical member below the level of the pu p stock in the vessel. Thepassage of the liquid portion of the pulp into the interior of the moldcauses the fibrousportion to adhere to thebelt', thus forming a la er or'web of paper stock which is forme continuously on the. belt and carriedaround with it. The "centrifugal pum 26 causes a local circulation ofpulp throng the tank 10 so that the pulp .moves in an angular path inthe same direction that the belt 33 moves, thus facilitating theformation of the la er 'var ing the speed of the centrifugal and of pulpstock or paper web on'the belt. y ump the speed of rotation of the cylinrical mold, it is possible to secure any desired effect in the formationof the paper web.

The irre larpaththrough which the pulp is compe led to flow by thearrangement of the weirs 13 and 17 and the baflie wall 19 secures aneven mixture of the stock and water and an even flow of the mixture overthe weir 13 in the region adjacent the mold. The web which is formedwhilethe belt is passing through the stock in the tank has considerablemoisture removed therefrom by the table rolls and suction boxes beforeit passes throu h the couch rolls and presses.

Although have shown and described one formof the invention for puoses'of illustration, itwill be understood t at it may be constructed invarious other ways without departing from the scope of the appendedclaims. I

I claim: 1. In apparatus of the class described, vessel for containingfluid pulp stock, a mold mounted in said vessel, a pair of conduitsleading to and from said vessel, means forcausing said ulp stock to flowfrom said vessel through one of said conduits and back through saidvessel to the other of said condults, and means for-causing the pulpstock to follow an irregular zigzag path before it reaches said mold.

2. In apparatus of theclas's described, a'

vessel for containing fluid pulp stock, a mold mounted in said vessel, apalrof conduits leading to and from said vessel, means for causing saidpulp stock to flow from said vessel through one of said conduits andback to said vessel through the other of said conduits, a pair of weirsmounted between said last' named conduits, and a battle wall mountedbetween said weirs.

3. In apparatus of the class described, a vessel'for containing fluidpulp stock, a mold mounted in said vessel, a'pair of conduits leading toand from said vessel, means for causing said pulp stock 'to flow fromsaid vessel through one of said conduits and back to said vessel throughthe other of said conduits, a pair of weirs mounted between said lastnamed conduits, and a baflle wall mounted between said weirs, saidballie wall terminating above the lower wall of said vessel.

. 4. In apparatus of the class described, a vessel for containing fluidpulp stock, said vessel having an overflow 1i on one side thereof, meansfor supplying uid pulp stock to said vessel, means for withdrawing thepulp stock discharge over said overflow lip and returning the same tosaid vessel at. the other side thereof, means for causing'said pulp toflow through an irr lar zigzag passage at the said other side 0 saidvessel,

and a mold mounted in said vessel between the sides thereof.

5. In apparatus of the class described, a vessel for containing fluidpulp stock, a cylindrical support mounted in said vessel, means forrotating said support, means for causing a positive movement of saidpulp stock adjacent said support in the same direction in which the pzrlifphery of said sup-. port moves, an endless p orated mold passingaround said support and extending upwardly out of said vessel, a seriesof table rolls over which said mold passes, a suction box engagin saidmold for removing moisture from t e pulp thereon, and a pair of couchrolls engaging said mold.

In testimony. whereof, I have'subscribed my name.

. VENNING D. SIMONS.

